public class polymor {
    // consider this as animal
    static class animal {

        public void sound() {
            System.out.println("Animal makes sound");
        }
    }

    static class cat extends animal {

        public void sound() {
            System.out.println("meow meow");
        }
    }

    static class dog extends animal {

        public void sound() {
            System.out.println("woof woof");
        }
    }

    static class owl extends animal {

        public void sound() {
            System.out.println("hoot hoot");
        }
    }

    public static void main(String[] args) {
        polymor owl1 = new owl();
        cat eevee = new cat();
        owl1.sound();
        eevee.sound();

    }

}